Correct Answer:
B. The results will be announced tomorrow
To transform an active voice sentence into passive voice, the object of the active sentence becomes the subject of the passive sentence. The verb form changes to "be + past participle". The original subject ("They") is often omitted or introduced with "by". In the active sentence, "the results" is the object, and "will announce" is the future simple active verb. Therefore, in the passive voice, it becomes "will be announced". Options A, C, and D do not follow the correct structure for the future simple passive voice. "Will announce" is active, "are announced" is present simple passive, and "were announced" is past simple passive.